LTC3528B Просмотр технического описания (PDF) - Linear Technology

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LTC3528B

1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm × 2mm DFN

Linear Technology 

LTC3528/LTC3528B

PIN FUNCTIONS

SGND (Pin 7): Signal Ground. Provide a short direct PCB

path between SGND and the (–) side of the input and

output capacitors.

VIN (Pin 8): Battery Input Voltage. Connect a minimum of

1µF ceramic decoupling capacitor from this pin to ground.

GND (Exposed Pad Pin 9): The exposed pad must be

soldered to the PCB ground plane. It serves as another

ground connection and as a means of conducting heat

away from the die.

BLOCK DIAGRAM

VIN

0.7V

TO 5V

CIN

4.7µF

L1

4.7µH

8

VIN

VOUT

VBEST

VB

ANTI-RING

5

SW

VSEL

WELL

SWITCH

VOUT 4

1 SHDN

4M

SHUTDOWN SHUTDOWN

VREF

UVLO

VREF

UVLO

START-UP

3 PGOOD

1MHz

CLK

OSC

VREF – 10%

FB

THERMAL

TSD

SHUTDOWN

PGND

6

GATE DRIVERS

AND

ANTI-CROSS

CONDUCTION

PK

COMP

PK

–+

IZERO

Σ

COMP

SLOPE

COMP

FB

2

LOGIC

IZERO

MODE

CONTROL

(LTC3528)

BURST

CLAMP

ERROR AMP

SLEEP COMP

VREF

FB

WAKE

SGND

7

SOFT-START

EXPOSED

PAD

9

3528 BD

VOUT

1.6V

TO 5.25V

R2

COUT

10µF

R1

3528fd

7

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